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Finding the Fourth Proportional to 68.14, 93.58 and 58.31

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Solution

The fourth proportional to 68.14, 93.58 and 58.31 is: 80.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.14 : 93.58 = 58.31 : x
  2. Step 2: Convert to fraction form
    68.14/93.58 = 58.31/x
  3. Step 3: Cross multiply
    68.14x = 93.58 × 58.31
  4. Step 4: Simplify right side
    68.14x = 5,456.11
  5. Step 5: Solve for x
    x = 5,456.11/68.14
  6. Step 6: Final answer
    x = 80.07

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.